SOLUTION: find the area of a regular octagon with one edge that measures 2 units

Algebra ->  Surface-area -> SOLUTION: find the area of a regular octagon with one edge that measures 2 units       Log On


   

Question 321121: find the area of a regular octagon with one edge that measures 2 units
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The area of any regular polygon with n sides of length s is:
ns%5E2%2Acot%28180%2Fn%29%2F4
= 8%2A2%2A2%2Acot%2822.5%29%2F4
= 8cot(22.5)
= 8*(sqrt(2) + 1)
=~ 19.3137 sq units